Can anybody help my plants?! Current culture

A

Andrew17197

Member

• Mar 15, 2021

• #1

Hi all,

PICTURES ATTACHED
FIRST 4 IMAGES TAKEN 5 DAYS AGO
REMAINING IMAGES TAKEN TAKEN NOW

I am having problems with my dwc grow. Leaves have started to turn lime green on new growth, then has now spread to the middle of the plant!

I thought this was potentially a light bleaching problem, as i had 3 plants not under direct light that weren't showing symptoms.

At this point the PPM was at 470 and PH at 5.9-6.0

It has only gotten worse, so 2 days ago I emptied the system and refilled system PPM at 420 and PH at 5.9 put in .
420ml UC roots
200ml calmag current culture
290ml veg A current culture
290ml veg B current culture.

system info
440L
Current culture nutes
Problems appeared in the last week

Today the system is PPM 420 and 6.0 PH.

I am using current culture nutes. To me looks like nutrient burn, but I am at a loss. I already lost 8 plants last week, I really don't want to lose these.
Have had 2 successful dwc in the past, last one pulled 9P from a 10ft x 10ft tent 2400w LEDs.

 

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A

Andrew17197

Member

• Mar 15, 2021

• #2

1 more photo

 

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rkymtnman

Well-Known Member

• Mar 15, 2021

• #3

looks like nute burn leading to lockout.

 

A

Andrew17197

Member

• Mar 15, 2021

• #4

rkymtnman said:

looks like nute burn leading to lockout.

Click to expand...

Best way to fix? Just pH water for a week? Do I turn down lights and co2?

 

rkymtnman

Well-Known Member

• Mar 15, 2021

• #5

you sure your pH meter is accurate?

is the ppm dropping at all?

i would flush w/ plain water for minimum 12 hours. then start back at 1/2 your nute strength

 

rkymtnman

Well-Known Member

• Mar 15, 2021

• #6

oh, and dim lights a bit and stop co2 until you got it figured out

 

A

Andrew17197

Member

• Mar 15, 2021

• #7

rkymtnman said:

you sure your pH meter is accurate?

is the ppm dropping at all?

i would flush w/ plain water for minimum 12 hours. then start back at 1/2 your nute strength

Click to expand...

I use bluelab guardian. PPM HAS NOT DROPPED IN 2 DAYS.

 

rkymtnman

Well-Known Member

• Mar 15, 2021

• #8

follow my advice and that should get you going again. good luck and keep us posted

 

A

Andrew17197

Member

• Mar 15, 2021

• #9

rkymtnman said:

follow my advice and that should get you going again. good luck and keep us posted

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Will do, thanks man.

 

A

Andrew17197

Member

• Mar 15, 2021

• #10

I am dumping my system now and going to refill with pHed water at 6.0. my tap water comes out at 120ppm.

 

rkymtnman

Well-Known Member

• Mar 15, 2021

• #11

Andrew17197 said:

I am dumping my system now and going to refill with pHed water at 6.0. my two water comes out at 120ppm.

Click to expand...

forgot to add you should add UC roots too during the flush. don't wanna get root rot on top of nute burn.

 

A

Andrew17197

Member

• Mar 15, 2021

• #12

rkymtnman said:

forgot to add you should add UC roots too during the flush. don't wanna get root rot on top of nute burn.

Click to expand...

Thank you heaps mate. Just curious as to why you thought it was nute burn. (Just so I can also identify it correctly)

 

rkymtnman

Well-Known Member

• Mar 15, 2021

• #13

pic 183 is the easiest to see. burnt tips. dying leaves.

usually that leads to nute lockout: ppm not dropping, Mg deficiency when you are adding cal/mg, etc.

 

A

Andrew17197

Member

• Mar 17, 2021

• #14

So I flushed my system for 12 hours and refilled it with 320ppm nutrients (about half recommended), but my plants are not showing signs of recovering. They look worse!

 

A

Andrew17197

Member

• Mar 17, 2021

• #15

rkymtnman said:

pic 183 is the easiest to see. burnt tips. dying leaves.

usually that leads to nute lockout: ppm not dropping, Mg deficiency when you are adding cal/mg, etc.

Click to expand...

Any recommendations? Plants are starting to go down hill fast.

 

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rkymtnman

Well-Known Member

• Mar 17, 2021

• #16

Andrew17197 said:

So I flushed my system for 12 hours and refilled it with 320ppm nutrients (about half recommended), but my plants are not showing signs of recovering. They look worse!

Click to expand...

is your ppm dropping at 320? are they drinking?

 

rkymtnman

Well-Known Member

• Mar 17, 2021

• #17

did you stop co2?

 

A

Andrew17197

Member

• Mar 17, 2021

• #18

rkymtnman said:

did you stop co2?

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Yes have stopped supplementing co2 & dimmed lights.

 

A

Andrew17197

Member

• Mar 17, 2021

• #19

rkymtnman said:

did you stop co2?

Click to expand...

I also went out and bought some pH strips to check against my bluelab guardian. My PH appears to be correct....

 

A

Andrew17197

Member

• Mar 17, 2021

• #20

rkymtnman said:

is your ppm dropping at 320? are they drinking?

Click to expand...

No ppm hasn't changed. And my system volume is too big to notice any water difference.